### Begin of the deletion Before filing a report

_Before you file a report, please ensure you are running the latest version of OpenProject and_ 
_have searched for similar bug reports._

###End of the deletion Steps to reproduce

Begin of the deletion _Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

End of the deletion 1. Login as a user with permissions to run cost reports (including full admins)

2. Go to the cost reports page of a project

3. Select a date range or last x days and user for labor cost filtering then hit `apply` to show the users' labor costs itemized

4. Observe message stating `There was an error handling the query.`


### What is the buggy behavior?

Begin of the deletion _Please describe the bug in as much detail as possible. Example:_

End of the deletion * Application logs say this is happening in:


```ruby
NoMethodError (undefined method 'migrate' for nil):
modules/reporting/app/controllers/cost_reports_controller.rb:165:in 'update'
```

* Somehow `@query` appears to be nil


### What is the expected behavior? Begin of the deletion

_Describe how the application should behave like. Example:_End of the deletion

1. Cost reports run correctly

2. Budgets show cost breakdowns as they did before v15 (presuming its related)


### Environment information

**OpenProject installation type**

* Packaged installation

* Arch


**OpenProject version**

_v15.0.2_

**Browser**

* [x] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

* [ ] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [x] Linux (Arch)
* [ ] Chrome OS
* [ ] Other (please specify)

**Language**

English